<template>
  <div class="box">
    <!-- 顶部栏 -->
    <mt-header fixed title="vue项目">
      <span slot="left" @click="goBack" v-show="flag">
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>

    <!-- 中间区域 -->
    <transition>
      <router-view></router-view>
    </transition>
    

    <!-- 底部区域 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link  class="mui-tab-item-user" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-user" to="/user">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">用户</span>
			</router-link>
			<router-link class="mui-tab-item-user" to="/cart">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
          <span class="mui-badge" id="badge">{{  $store.getters.getAllCount }}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-user" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
  </div>
</template>

<script>
 export default {
        data () {
            return {
                flag:false
            }
        },
        methods:{
            goBack(){
              this.$router.go(-1);
            }
        },
        created(){
           this.flag = this.$route.path === "/home" ? false : true;
        },
        watch:{
          "$route.path":function(newVal){
            if(newVal === "/home"){
              this.flag = false;
            }else{
              this.flag = true;
            }
          }
        }
    }
</script>


<style lang="scss" scoped>
  .box {
    padding-top:40px;
    overflow-x: hidden;
    padding-bottom: 50px;
  }
  .v-enter {
    opacity: 0;
    transform: translateX(100%);
   
  }
  .v-leave-to{
    opacity: 0;
    transform: translateX(-100%);
    position: absolute;

  }
  .v-enter-active,
  .v-leave-to{
    transition: all 0.5s ease;
  }
  .mui-bar-tab .mui-tab-item-user {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-user .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}
.mui-bar-tab .mui-tab-item-user.mui-active{
  color: #007aff;
}
.mui-bar-tab .mui-tab-item-user .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>
